/*
 * Copyright 2009 Sven Meier
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package wicketdnd;

import org.apache.wicket.RequestCycle;
import org.apache.wicket.ResourceReference;
import org.apache.wicket.behavior.AbstractBehavior;
import org.apache.wicket.markup.html.IHeaderResponse;
import org.apache.wicket.markup.html.resources.JavascriptResourceReference;
import org.apache.wicket.protocol.http.request.WebClientInfo;

/**
 * Fix for cursors in IE. <br>
 * IE resolves relative URLs in CSS cursor styles against the page's location
 * instead of the CSS's location (note: this failure affects cursor images
 * only). This javascript makes these URLs absolute by prepending the containing
 * CSS's location.
 * 
 * @author Sven Meier
 */
public class IECursorFix extends AbstractBehavior
{

	private static final long serialVersionUID = 1L;

	public static final ResourceReference JS = new JavascriptResourceReference(IECursorFix.class,
			"iecursor.js");

	public final void renderHead(IHeaderResponse response)
	{

		WebClientInfo info = ((WebClientInfo)RequestCycle.get().getClientInfo());
		if (info.getProperties().isBrowserInternetExplorer())
		{
			response.renderJavascriptReference(JS);

			String initJS = "IECursor.fix();";
			response.renderOnDomReadyJavascript(initJS);
		}
	}
}
